About BEST Recruitment.The Brihanmumbai Electricity Supply and Transport (BEST) Undertaking is the civic transport and electricity provider public body based in Mumbai, India. Originally set up in 1873 as a tramway company: Bombay Electric Supply & Tramways Company, the BEST set up a captive Thermal power station at Wadi bunder, Mumbai in November 1905 to generate electricity for its trams that positioned it to also supply electricity to the city of Mumbai.